Calculator suite

Date & Age Calculators

Every calculator in one place — each one runs instantly in your browser and never stores what you enter. Pick a tool to get started.

Age Difference Calculator

Find the exact gap between two birth dates, in years, months, and days.

Find your exact age from your date of birth — in years, months, days, and more.

Count the exact time between two dates — years, months, days, weeks, business days, and hours.

Add or subtract years, months, weeks, and days from any date.

Count down to your next birthday — plus the day you were born and the age you're turning.

Exact age as of a test date — in years, months, days, and the years:months notation used on assessments.

Find out which generation you belong to from your birth year.

Find out what day of the week any date falls on — past, present, or future.